Machine for tuck-pointing.



F. 0. SKOOG. MACHINE FOR TUGK POINIING. APYLIOATION rum) NOV. 1. 1911.

Patented Mar. 11, 1913.

2 SHEETS-SHEET 1.

F. O. SKOOG. MACHINE FOR TUOK POINTING. APPLICATION FILED NOV. 1. 1911.

1,055,565. Patented. Mar. 11, 1913.

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Wlnessei 5 (r Barneys- Pointing.

UNITED STATES PATENT @FFTGE.

FRANK O. SKOOG, OF CHICAGO, ILLINOIS.

MACHINE FOR TUCK-POINTING.

Specification of Letters Patent.

Serial No. 657,945.

1 '0 all Iclwm it may concern Be it known that I, FRANK O. Snooo, a subject of the King of Sweden, residing at Chicago, in the county of Cook and State .of Illinois. have invented certain new and useful Improvements in Machines for Tuckof which the following is a specification.

My invention relates to masonry work and has particular reference to a machine for tuck pointing, or one which feeds the mortar or plastic material to the operators trowel, pointer or other tool used for applying 'mortan cement and the like.

The particular object of the invention is to provide a machine for repairing or pointing up the crevices formed between bricks for blocks where the mortar or binder has fallen br'crumbled away through the action of the weather. lVhere the walls of a large office building are to be repaired in this manner the work consumes considerable time and energy where the workman must mix his .'mortar in small quantities at frequent intervals, carry it on a mortar board, and pick it up a little at a time by his pointing tool. The present invention is designed to flow the mortar onto the tool and enable the operator to wield the tool uninterruptedly in applying the binding mate rial neatly, rapidly and with a saving of material spilled through the old methods of application.

\Vith the above-named objects in view my invention consists in the .novel construct-ion.

' combination and arrangement of parts hereinafter described in detail, accompanying drawings the appended claims.

In the drawingsFigu1-e1 is an elevation, partly in section, of a machine embodyin my invention. Fig. 2 isa section taken substantially on line 2-42 of Fig. 1. Fig. 3, is an exterior view of the nozzle with a scction of the hose attached thereto. Fig. 4 is an enlarged longitudinal section through a broken away portion of the nozzle. Fig. 5 is a perspective view of a pointing tool together with the clamp by means of which it is attached to the nozzle. Figs. 6 and 7 are two forms of cross-section of the point ing tool. Fig. 8 is a plan view of the closer for the mortar receptacle of the machine.

illustrated in the and incorporated in ventlon comprises a receptacle or mortar tity of binder such as mortar or cement, a mechanism for forcing this material through a hose or flexible tube to the operators pointing-tool and various novel features for facilitating this work.

In the several views 2 horse or supporting legs for the machine, which is provided with a flange or brackets 3 which rest on the horse. The parts 3 are riveted to a mortar-receptacle or tank 4 which is preferably made of cylindrical form with a concave bottom portion 5 riveted to the'body of the tank by rivets 6. The heads of these rivets within the tank are utilized as supports or ledges for a screen 7 through which the plastic material must pass to an opening 8 in the bottom of the tank. This opening is provided with a nip-- ,ple or short section of pipe 9 which is riveted to a flange 10 formed by bending downward the edges of the opening 8. To the nipple is attached a hose or flexible tube 11, one end of which is shown in Fig. 1 while its opposite end is shown in Fig. 3, the intermediate portion being broken away. The machine is preferably placed on the roof of a building to be pointed up so as to obtain the assistance of the force of gravity in flowing the material through the hose 11 to its nozzle shown in Figs. 3 and 4 which will follow the operator along the wall or structure upon which the Work is to be done. The nozzle has at least a portion thereof of rectangular form in crosssection, as indicated by the configuration of the structureshown in Fig. 5.

"ithin the tank is fitted a cover plastic material, a follower or or an operating screw. lower or presser-foot is composed of a wooden slab 13. the upper surfa of which as a covering 14 of sheetmetal. A similar covering 15 is provided for the under-side of the follower. The diametel of the portion 13 is a little less than the portions 1% and 15, which provides a channel in the edge represents El.

of the a presser-foot This cover, fol- In this channel is placed a packing-ring 16. In the follower is an openingl? provided with a cover or closer 18 that is clamped onto the top of the follower by means of a. screw 19 provided with a lever or handwheel 20. This screw has threaded engage m nt with a bar 21 the endsof which are held by a pair of brackets 22 secured to the follower; Pressure 'is *atentedMar.11,1913.

of the follower between its plates 14 and 15.

broughtto bear upon the follower and the mass of mortar or other plastic material, for the purpose of forcing same through the hose 11, by the lower end 23 of a screw 2- This screw has threaded engagement with a sleeve or bushing 25 splined at 9.6 to a hub 27 of a gear-wheel The sleeve is thus rotatable with the gear wheel 28 and is movable lon gitudinally in the hub 27. On the upper end of the sleeve 35 is a flange 29 which contacts with .the upper end of the hub 27. On this flange is mounted a bearing-ring 30. Above the latter is another and similar ring 31, and between the two rings are interposed anti-friction balls 32, the lower ring to rotote with the sleeve and the hub while the upper remains stationary. Against the hp per ring the lower end of a spring 33, coiled around the screw 24, is brought to hear. The upper end of the spring bears against a cross-beam 34 throughwhich an opening 35 is made for the screw 24. The beam 34 is secured to upright bars 3(5and 37. The lower end of the hub 27 of the wheel 28 is supported on a bar 38 rivctedait, 39, 39 to the upright frame-bars 36 and 37, the hub being engaged by a flange 40 on a disk $0, an annular groove ll being formed in the hub to receive the lugs. The disk 4:0 is secured by means of rivets 4:2. The screw 24 is held against rotation by an arm 43 secured to the screw and provided with a fork 44. The latter has slidable engagement with a post 45 bolted at 46, to the upright The gear wheel 28 is rotated by means oit a pinion 47 keyed to a shaft 48 mounted in bearings it). The shaft has a squared end 50 to which a crank 51 is applied. On the shaft 48 is also keyed a small geauwheel which meshes with a lar 'e 'ear-wheel53.

keyed to a sha t 54; mounted in bearings secured to the upright 37. The shaft has also a bearing in a drop bracketor arm 5t secured to the cross-bar 38. The shaft S-l is held against longitudinal movement in one direction by a head 57 which bears against the arm 56, and against such movement in the opposite direction by a washer shrunk on the shaft. The large wheel 53 and its shaft 54 rotate idly when the crank 51 is attached to the shaft 45:, but when the crank is applied to the squared end 5t) of the shaft Tel and rotated the large wheel becomes the 1 drivihg whcel rotating the smaller whecl' and its shaft at a considcrabtv higher speed I than when the crank is applied to the upper shalt, 'lhe crank is operated on the latter when the screw is forced downwardly against the l'ollmvcr on the plastic mass. or

when the grcatcr power is required. and the large wheel is uscd as the the purpose of rapidly return1n; the follower to the top of the tank preparatory to refilling some.

driving wheel for Referrin now, to the nozzle 12 to which one end 0 the hose or flexible tube 11 is attached. Through one of the sides, the upper one labeled ()0 in Iiigs. 3 and t, is an opening or slot (31 and in the inner faces of parallel sides (32 and 63 of the nozzle, are grooves (54, one of which is shown in Fig. 4. In said slot and grooves is mounted a gate valve 65, which is operated to open or close the passage through the nozzle, or to start and stop the-flow of plastic material therethrough. The gate-valve (35 is held normally raised or open by a spring 66 mounted on a clamp (57 attached to-the nozzle. An arm 68 is secured to a clamp 69 on the nozzle, and on the free end of this arm is a lug or sto) 70 which limits the opening movement ot the valve (55 or prevents the valve from moving; far enough outwardly to become disengaged from its sloth Between the bracket 69 and a similar bracket 71. is held a packing-disk 72 which prevents leakage of material thrmlgh the'gate-valve openinn in the nozzle.

At the outlet or tip end of the nozzle 12 is secured the pointing tool or trowel. This tool, 73, is held on the nozzle by means of a double clamp 74 having ears 75 and 76 with bolt-holes 77 therein for bolts 78. The form of the tool 73 may be varied in numerous ways as to its form. but for point ing purposes the construction shown is the accepted form either flat or curved transversely lndicated in Figs. 6 and 7 Where '7? indicates the flat form and T3 the concave. The flat form is about in thickness and about 13 in width While the curved form is usually only '1 in width. The concave form is used with the concave side toward the spaces between bricks to be tilled in and to form a slightly projecting head outside of the plane of the wall surface. In Fig. l a fastening collar 79 is used for holding the hose on the tank nipple. and a similar collar 80 secures the hose to the nozzle.

H1. and 82 are struts to which the lower end 2 3 of the screw it is swivelech and 83 represents a shallow recess for the end of the screw in the i'ollowcr.

In operation the machine will be placed, prcl'crably; at some point above where the operator handles the nozzle, the follower will be raised to thc upper end of the receplaclc 1 and the cover to will be removed when the receptacle 1 may be filled with the plastic material. liter the receptacle is lilh-d an operator will manipulate the crank 51 to force the nndcrial through the hose into lhc nozzle. The operator of the latter will conlrol lilo [low by manipulation of the spring i l to open or close the valve 65, which may he done sinmllancously with the guidiiu: of the tool 723 by grasping the nozzle at the spring i or including both nozzle or spring in the grip. Any excess force of pres-1 sure will be taken up by the spring 33 which will be tensioned to y1eld only to such ex- 2 cess pressure, or, in other words, permit the sleeve 25 to use if the screw is advanced too tor, in which event no attendant is necessaryfor the purpose" of operating the crank.

When the receptacle 4 has been emptiedof its contentsthe follower may be quickly raised by applying the crank to the squared end 59 or driving the wheel 52 by, the Wheel 53 in the proper direction to return the screw to its raised position. The confinement of the mortar, or whatever plastic binder is used," in the closed vessel 4: will prevent the massjfrom, drying or hardening as rapidlyas when spread upon a mortar board and larger quantities may be prepared at each mixing of binder materialsl Having thus described my invention,v

I claim as new and desire to secure by Letters Patent 1. The combination with a pointing tool or trowel, of a container for binder material, a nozzle upon which said tool or trowel is mounted, a flexible tube for conveying said material to said nozzle, means in said nozzle for controllingthe flow, therethrough, and means for forcing said material from said container through said nozzle. 2. The combination with a masons trowel or pointing tool, of a receptacle for plastic material to be applied with the aid of said tool, a nozzle upon which said tool is. mounted, a conduit between said receptacle and tool, means for forcing said material through said conduit, and a valve on said nozzle for-controlling the flow through said conduit, or for checking and releasing'the flow of material under the operation of said forcing means.

The combination with a trowel or pointing tool, of a receptacle for binder n'iateria'l, a conduit between said receptacle and, tool, follower in said receptacle for creating pressure on amass of plastic material to. force it through said conduit, a crank-operated screw for moving said follower, a yieldingly mounted nut or threaded sleeve for said screw to take up excess follower pressure under the action of the screwoperating mechanism, and a valve-controlled outlet for said pointing tool through which the material is flowed onto said tool.

In testimony whereof I have hereunto set my hand in the presence of. two subscribing witnesses.

FRANK O. SKOOG. Witnesses JOHN Senor-m, M. CJALLEN. 

